void GLContext::drawImage(const Image& image, const Vec4f& pos, const Vec2f& align, bool topToBottom)
{
const Vec2i& imgSize = image.getSize();
if (imgSize.min() <= 0)
return;
Buffer& buf = image.getBuffer();
ImageFormat format = image.getFormat().getGLFormat();
const ImageFormat::StaticFormat* sf = format.getStaticFormat();
glActiveTexture(GL_TEXTURE0);
const Vec2i& texSize = bindTempTexture(imgSize);
// Format is not supported by GL => convert and upload.
if (image.getFormat() != format || image.getStride() != imgSize.x * format.getBPP())
{
Image converted(imgSize, format);
converted = image;
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, imgSize.x, imgSize.y, sf->glFormat, sf->glType, converted.getPtr());
}
// Data is already on the GPU => transfer to the texture.
else if (buf.getOwner() == Buffer::GL || (buf.getOwner() == Buffer::Cuda && (buf.getHints() & Buffer::Hint_CudaGL) != 0))
{
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, buf.getGLBuffer());
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, imgSize.x, imgSize.y, sf->glFormat, sf->glType, NULL);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
}
// Otherwise => upload.
else
{
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, imgSize.x, imgSize.y, sf->glFormat, sf->glType, buf.getPtr());
}
// Determine orientation.
Vec4f posLo = m_vgXform * pos;
Vec2f posRange = Vec2f(imgSize) * m_viewScale * posLo.w;
posLo -= Vec4f(align * posRange, 0.0f, 0.0f);
Vec2f posHi = posLo.getXY() + posRange;
if (topToBottom)
swap(posLo.y, posHi.y);
// Draw texture.
glPushAttrib(GL_ENABLE_BIT);
glDisable(GL_CULL_FACE);
drawTexture(0, posLo, posHi, Vec2f(0.0f), Vec2f(imgSize) / Vec2f(texSize));
glPopAttrib();
checkErrors();
}
Image* FW::importBinaryImage(InputStream& stream)
{
// ImageHeader.
char formatID[9];
stream.readFully(formatID, 8);
formatID[8] = '\0';
if (String(formatID) != "BinImage")
{
setError("Not a binary image file!");
return NULL;
}
S32 version;
stream >> version;
if (version != 1)
{
setError("Unsupported binary image version!");
return NULL;
}
S32 width, height, bpp, numChannels;
stream >> width >> height >> bpp >> numChannels;
if (width < 0 || height < 0 || bpp < 0 || numChannels < 0)
{
setError("Corrupt binary image data!");
return NULL;
}
// Array of ImageChannel.
ImageFormat format;
for (int i = 0; i < numChannels; i++)
{
S32 ctype, cformat;
ImageFormat::Channel c;
stream >> ctype >> cformat >> c.wordOfs >> c.wordSize >> c.fieldOfs >> c.fieldSize;
if (ctype < 0 || cformat < 0 || cformat >= ImageFormat::ChannelFormat_Max ||
c.wordOfs < 0 || (c.wordSize != 1 && c.wordSize != 2 && c.wordSize != 4) ||
c.fieldOfs < 0 || c.fieldSize <= 0 || c.fieldOfs + c.fieldSize > c.wordSize * 8 ||
(cformat == ImageFormat::ChannelFormat_Float && c.fieldSize != 32))
{
setError("Corrupt binary image data!");
return NULL;
}
c.type = (ImageFormat::ChannelType)ctype;
c.format = (ImageFormat::ChannelFormat)cformat;
format.addChannel(c);
}
if (bpp != format.getBPP())
{
setError("Corrupt binary image data!");
return NULL;
}
// Image data.
Image* image = new Image(Vec2i(width, height), format);
stream.readFully(image->getMutablePtr(), width * height * bpp);
// Handle errors.
if (hasError())
{
delete image;
return NULL;
}
return image;
}
